a four-dimensional vetor, its components are descending dimension coefficients of the equation.
Value
all the solution to the equation
Details
the function is used to solve an cubic equation. the parameter of this function is the coefficients of your function. if you want to solve the equation x^3+5x^2-4x+9, then the parameter should be a<-c(1,5,-4,9)
References
the function includes some other functions which have been exsisted in R
require(stats)
a <- c(1,5,-4,9)
Cubic(a)
##---- Should be DIRECTLY executable !! ----##-- ==> Define data, use random,##-- or do help(data=index) for the standard data sets.